I'd get to know the maps a little on easy, then up to normal, practice a bit, then you'll be ready for some advanced / expert online, best played with friends.
One key tricky aspect of advanced, apart from how frequently the bosses spawn (and in groups too), is friendly fire - it hurts. I'm still trying to control my trigger finger
#4208263, By urizen Left 4 Dead Organise Online Games Thread.
urizen 2,158 posts
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